Emilio;- Some time ago, I was refered to the "Growth of Biological Thought" by Dr. Mayr. I was refered to one chapter and ended up reading the whole book. (I don't claim to have understood it all) What I would like to know now is: Who is or was Ernst Mayr? Is there biographical information on this Guru? Like you, I was impressed not only by the thought and information presented but captured by his style. Art